Abstract
Several chromone-3-carboxanilides (7a-f) were prepared by amidation of chromone-3-carboxylic acid (6), or better, by cyclization of 2- (2-hydroxybenzoyl) acetanilides (9a-c). In the latter procedure, the direct and convenient synthesis of 2- (2-benzyloxybenzoyl) -acetanilides (8a and 8b) from 2-benzyloxyacetophenone (1) was achieved using aryl isocyanates in the presence of NaH.
